PTO Switch: Operation
WARNING: This page is about a different car, the 2004 Dodge Pickup and 2004 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
This input is used only to tell the ECM that the aftermarket PTO (Power Take Off) unit has been engaged. The ECM will disable (temporarily shut down) certain OBD II diagnostic trouble codes when the PTO unit is engaged.